POC Object-Oriented Programming in Python 3

Question 1

What is polymorphism in the context of Python OOP?

Accepted Answer

The ability of different objects to respond to the same method call in different ways

Answer

The ability to create multiple instances of the same class

Answer

Using multiple inheritance to combine classes

Answer

Restricting access to class attributes

Question 2

Which of the following is an example of duck typing in Python?

Accepted Answer

Calling a method on an object regardless of its class, trusting it has that method

Answer

Checking an object's type with `type()` before calling a method

Answer

Using `isinstance()` to verify class membership before use

Answer

Inheriting from a common abstract base class

Question 3

What is the output of calling `type(42)`?

Accepted Answer

Answer

Answer

Answer

int

Question 4

What does the `@staticmethod` decorator do?

Accepted Answer

Defines a method that does not receive the instance or class as an implicit first argument

Answer

Binds a method to the class rather than an instance, receiving `cls` as the first argument

Answer

Makes a method immutable

Answer

Automatically caches method results

Question 5

Which method is called when an object is about to be garbage collected?

Accepted Answer

__del__

Answer

__init__

Answer

__delete__

Answer

__exit__

Question 6

What is an abstract class in Python?

Accepted Answer

A class that cannot be instantiated and is meant to be subclassed, often using the `abc` module

Answer

A class with no methods defined

Answer

A class that only contains static methods

Answer

A class defined inside another class

Question 7

Given `class B(A):`, what happens if `B` does not override method `foo` defined in `A`?

Accepted Answer

Calling `b.foo()` executes `A`'s version of `foo`

Answer

Calling `b.foo()` raises an AttributeError

Answer

Python automatically creates an empty `foo` in `B`

Answer

The method is deleted from `B`